The Gator Cases GK-LT-25W Midi Controller and Laptop Backpack is a combination Backpack/Rolling bag designed to carry most 25 note controllers and a laptop. It has exterior pockets that allow storage for interfaces, cables and other recording accessories. There is a retractable wheel and handle that is removable for back pack use. The shoulder strap can be hidden inside an exterior pocket when the handle is in use. The expandable top accommodates up to 32 & 37 note controllers and there are padded interior insert protects gear.